Apparatus for making asphalt roofings



April 1, 1930. E. SAKUMA APPARATUS FOR MAKING ASPHALT ROOFINGS Filed Feb. 24, 1928 .1. 4 [Lu A r s V! TWE T N k Nam/R if vmm 2% an Patented Apr. 1, 1930 UNITED STATES PATENT OFFICE EIKICHI SAKUMA, OF TOKYO FU, JAPAN APPARATUS FOR MAKING ASPHALT ROOFING S Application filed February 24, 1928, Serial No. 256,791, aud in Japan March 14, 1927.

This invention relates to an apparatus for making asphalt roofings, comprising means for adjusting the tension of paper sheet passing through an asphalt pan, means for drying asphalt-coated sheet above said pan, means for effecting secondary osmotic action upon said sheet, means for sprinkling anti-slip powder on both surfaces of the sheet coming from said osmotic means to drying rolls, means for sweeping the powder off said sheet during its passage through several drying rolls.

The object of the invention is to provide an apparatus for making asphalt roofings automatically by drying the paper material by utilizing the hot air and ventilation above the asphalt pan after the material has passed through the pan and becomes impregnated with asphalt, supplying anti-slip powder on both surfaces of the sheet to prevent slipping and sweeping off the powder when the paper is dried.

The products obtained by the apparatus of this invention excel all those manufactured by the other known devices in the quality and are less expensive, because they can be made automatically and continuously with high efficiency.

Referring to the accompanying drawing,

Fig. 1 shows the elevational arrangement of the right hand part of this apparatus.

Fig. 2 shows the same arrangement of the left hand part.

Fig. 3 is the partial sectional view of the device for supplying anti-slip powder.

Fig. 4 the side View of the same. The same reference characters denote the same parts. In the drawing, the shaft 2 of a paper roll 1 is rotatably supported upon the bearing 4: fixed to a column'3. A guide roll 6 is supported by a bracket 5 projecting from the support 3. Paper P passing over the guide pulley 6, is guided into the asphalt pan 7. The pan 7 is filled with asphalt and heated by afurnace F to a certain temperature to melt the asphalti The pan has several guide pulwhich can be driven by, a handle 10. Thus, the roller 8 can readily-be moved up and down by'the handle 10 toa desired height so as to enablethe paper materialjto pass the liquid asphaltin a desired depth, atfthe'same time giving the paper'su'itable' tension. The paper which has passed through the pan 7 passes between a pair of drying rolls 12, 12 mounted on the frame 11 which is fixed to the left hand side. of the furnace F, and around the guide pulley 14 supported by the column 13 fixed to said frame and then passes to the right and to the left around the roll 16 supported-on the bearing 15 on the column- 3. In this way, the paper'fimoving right and left several times is drawn by a pair of drawing rolls 18 supported by the column 17.

' Over this pan there isa hopper 19 suspended so as to cover it. With the upper end of the hopper is connected a pipe 20 which is inserted slidably into a vertical funnel 22 sup- 1 ported on a suitable frame 21. 'A hopper 19 f is connected with a handle H by a rope 23 or 1 'like means. The hop er is lifted bythe han-J? dle H as shown'in ig. 1, and lowered sud dently in time of a fire to cover the pan and thus to extinguish the fire. The hopper is normally lifted as'shown in the drawing so as to aid the ventilation and drying. This device is also used above the secondary pan and makes the fire extinguishing apparatus.

The secondary pan 24 is mounted on the furnace F, on the left side of which is mounted a pair of drying rolls 25. Paper material 1 passes over the guide roll 26 provided on the right side of the pan into the pan 24 and then to the drying rolls 25 'When it is desired to coat only one surface (the lower face for example) of the paper with the secondary asphalt, a pair of rolls 27 isused instead of the pair of drying rolls 25. These rolls 27 are mounted on an inclined frame 28 fixed on the furnace F, the lower roll 27 being adapted to turn on its axis touching the asphalt. Therefore. if the paper na sees (i-00H? 'Fv'nm mm rolls 25 passes around of the pan 24, a uide roll having a lever 29 is used to guide t ie paper thereinto.

' Paper coming through the rolls 25 is sent to the device for supplying anti-slip powder. As shown in Fig. 1, this device comprises three guide rolls 31, 32 and 33, each rotatably mounted on a frame 30, powder-distributing rolls 34 and 35, and hoppers 36 and 37. Rolls 32 and 33 can be moved right or left to adjust the tension of paper. Hopper 36 is constructed as shown in Figs. 3 and 4, and its open bottom covers the upper periphery of the distributing roll 34, but there is a suitable clearance between the forward edge of the hopper and the periphery of the roll. Said clearance constitutes the delivery opening for the powder and can be adjusted by lifting or lowering the gate 50 slidably mounted on the forward plate of the hopper by slot and bolt connection 38, so that the powder delivered by the hopper may be suitably adjusted. A hopper 37 and a roll 35 have the same construction as the hopper 36 and the roll 34. As itis undesirable to supply the paper with too much powder, the present invention has means to adjust the quantity of powder to be supplied. The paper coming from the the rolls 31, 32 and 33 successively and then to a guide roll 39. While the paper is moving in this way, suitable anti-slip powder is supplied to both surfaces of the paper by distributing rolls 34 and 35 as shown in the drawing.

Thus, the paper sprinkled with powder passes around the guide pulley 39 to a drying apparatus. This drying apparatus consists of a series of rolls 40 disposed obliquely and another series of rolls 41 similarly disposed. Paper passes around these rolls suitably to the next pressing roll in such a manner that paper may be suitably dried. Of these rolls,.a roll such as 41 may be provided with brushes 42 for sweeping the powder ofl both surfaces of the paper. These brushes rotate in contact with the paper surfaces and are enclosed in a casing 43 to prevent dust from scattering.

The paper suitably dried-and cleaned from powder by said drying apparatus passes through one or more pairs of pressing rolls 44, (the pressure of which may be adjusted) and comes on the table45 and then passes through measuring device 46 and finally is rolled up by the winding drum 47.

Claims:

1. In combination, an open topped coating tank adapted to contain hot coating material, means to conduct a fabric web through said tank, means to support said sheet after passing through the tank in position above the hot material, a ventilating hood over the tank and above the supported sheet, and means to raise and lower said hood, said hood being normally spaced from the tank to 'provide for the admission of drying air.

2. In combination, an open topped coating tank adapted to contain hot coating material, means to conduct a fabric web through said tank, means to support said sheet after passing through the tank in position above the hot material,a ventilating hood over the tank and above the supported sheet, means to raise and lower said hood, said hood being normally spaced from the tank to provide for the admission of drying air, means in said tank to control the tension of that portion of the web in said tank and means to adjust the tension controlling means.

In combination, an open topped coating tank adapted to contain melted asphalt, means to conduct a fabric web through said tank, means to support said sheet after passing through the tank in position above the hot asphalt, a ventilating hood over the tank and above the supported sheet, and means to raise and lower said hood, said hood being normally spaced from the tank to provide for the admission of drying air.

4. In combination, an open topped coating tank adapted to contain melted asphalt, means to conduct a fabric web through said tank, means to support said sheet after passing through the tank in position above the hot asphalt, a ventilating hood over the tank and above the supported sheet, means to raise and lower said hood, said hood being normally spaced from the tank to provide for the admission of drying air, means in. said tank to control the tension of that portion of the web in said tank and means to adjust the tension controlling means.

EIKICHI SAKUMA. 

